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Biochemistry - Cell Signalling and Transduction

Exercise : Cell Signalling and Transduction - Section 1
  • Cell Signalling and Transduction - Section 1
21.
A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?
It is in the heart muscle
It is also the site of production for the signaling molecule
It contains the receptor for the signaling molecule
It is incapable of signal transduction
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is
phosphokinase C
phospholipase C
phosphodiesterase C
lipokinase
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
The binding of ligands to many G-proteins linked receptors leads to shortlived
increase in the concentration of certain intracellular signaling molecules called second messenger
decrease in the concentration of certain intracellular signaling molecules called second messenger
increase in the concentration of certain extracellular signaling molecules called first messenger
decrease in the concentration of certain extracellular signaling molecules called first messenger
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Which of the following processes involve the combining of a message from one signaling molecule with that of another to either enhance or inhibit a cellular effect?
Signal transduction
Signal reception
Signal integration
Signal amplification
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
A signal cascade induced by adrenaline or thyroxine
must begin with receipt of the signal molecule by a surface receptor
involves the activation of a G protein
results in the activation of a sequence of enzymes needed for the cell effect
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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